[INFO] fetching crate idlset 0.1.9...
[INFO] checking idlset-0.1.9 against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] extracting crate idlset 0.1.9 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate idlset 0.1.9 on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate idlset 0.1.9
[INFO] finished tweaking crates.io crate idlset 0.1.9
[INFO] tweaked toml for crates.io crate idlset 0.1.9 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate idlset 0.1.9 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3a3986bb907fc9f2e834e5d6c486d95d21e6b9acce4160a67a0586bc4446699d
[INFO] running `Command { std: "docker" "start" "-a" "3a3986bb907fc9f2e834e5d6c486d95d21e6b9acce4160a67a0586bc4446699d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a3986bb907fc9f2e834e5d6c486d95d21e6b9acce4160a67a0586bc4446699d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a3986bb907fc9f2e834e5d6c486d95d21e6b9acce4160a67a0586bc4446699d", kill_on_drop: false }`
[INFO] [stdout] 3a3986bb907fc9f2e834e5d6c486d95d21e6b9acce4160a67a0586bc4446699d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8800cc19a73ff00adb39c57847845f18984643528d3926416c23ebe6103020fa
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8800cc19a73ff00adb39c57847845f18984643528d3926416c23ebe6103020fa", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking serde v1.0.105
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]    Compiling serde_derive v1.0.105
[INFO] [stderr]     Checking smallvec v1.2.0
[INFO] [stderr]     Checking idlset v0.1.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/idl_simple.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn len(&self) -> usize {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/idl_simple.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn len(&self) -> usize {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.59s
[INFO] running `Command { std: "docker" "inspect" "8800cc19a73ff00adb39c57847845f18984643528d3926416c23ebe6103020fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8800cc19a73ff00adb39c57847845f18984643528d3926416c23ebe6103020fa", kill_on_drop: false }`
[INFO] [stdout] 8800cc19a73ff00adb39c57847845f18984643528d3926416c23ebe6103020fa